So, I have heavily textured, wavy hair (AKA as Hagrid Hair) and struggle to find products that work well in my hair and combat Queensland humidity. It is mostly a losing battle as my haircare product drawer can testify. But this seemed to help - my hair was definitely sleeker for an extra day before the frizz creeped back in, and post shampoo, it did seem to naturally straighten my hair a little, before I attempted to restyle.
No lie though, its a little laborious to set with heat, and to blowdry my hair this often adds frizz before its tamed with a straightener, so it feels like you're taking a step backwards first. I will use the whole bottle, but I think i'm unlikely to repurchase!